이에요 is correct. 이에요 can be briefly put 예요 sometimes depending on a noun ahead of it. 이예요 is an incorrect expression in most cases which is, i believe, one of the most common mistakes Koreans make too.
October 27, 2018
Refer to (https://ko.dict.naver.com/#/correct/korean/info?seq=109)
이에오 is correct.
결론적으로 받침이 있는 말 다음에는 '책상이에요/책상이어요', 받침이 없을 때에는 '나무예요', '아니다' 다음에는 '아니에요/아녜요'라고 할 수 있습니다.
It's mean , you can use 이에요 has final consonant (ex-물, 바람, 책, 꽃, 사람) 물이에요, 바람이에요, 사람이에요.
You can use 예요 , not have final consonant (ex- 나무, 해, 모래) 나무예요 , 모래예요
Also it is wrong 이예요 , 예요 is right word
I hopefully help you ^^
October 28, 2018
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